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Gas and tar generation behavior during flash pyrolysis of wood pellet and plastic

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Abstract

Fluidized bed gasifiers (FBGs) and gas engines (GEs) could be available as waste-to-energy technology, because most small- and medium-scale municipal solid waste treatment plants have low electricity generation efficiencies. As feedstock composition vary widely based on regional characteristics, clarifying the relationship between gas and tar generation behaviors and feedstock is useful for the design of the GE generation process to predict gas and tar yields and compositions. To understand the synergistic effect of feedstock characteristics in fluidized bed gasification, flash pyrolysis of wood pellet, polyethylene, and polypropylene at 900 °C was conducted. Yields and compositions of gasses and tar from single and co-pyrolysis were investigated. The results reveal that co-pyrolysis increases the gas yield because of oxygenates and moisture present in the wood pellet. Tar yields found to decrease while polycyclic aromatic hydrocarbons (PAHs) are not reduced even during co-pyrolysis. That is because most chain hydrocarbons of tar are converted to CmHn gases and PAHs.

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Abbreviations

FBG:

Fluidized bed gasifier

GE:

Gas engine

MSW:

Municipal solid waste

PAHs:

Polycyclic aromatic hydrocarbons

PE:

Polyethylene

PP:

Polypropylene

TIC:

Total ion chromatograph

RPF:

Refuse paper and plastic fuel

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Authors and Affiliations

  1. Environment Preservation Research Center, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, Japan

    Myo Min Win, Junya Yano & Shin-Ichi Sakai

  2. Kyoto University Graduate School of Global Environmental Studies, Kyoto University, Kyoto, 606-8501, Japan

    Misuzu Asari

  3. Kobelco Eco-Solutions Co. Ltd, Kobe, Japan

    Ryo Hayakawa & Hiroyuki Hosoda

Authors
  1. Myo Min Win
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  2. Misuzu Asari
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  3. Ryo Hayakawa
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  4. Hiroyuki Hosoda
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  5. Junya Yano
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  6. Shin-Ichi Sakai
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Correspondence to Junya Yano.

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Win, M.M., Asari, M., Hayakawa, R. et al. Gas and tar generation behavior during flash pyrolysis of wood pellet and plastic. J Mater Cycles Waste Manag 22, 547–555 (2020). https://doi.org/10.1007/s10163-019-00949-8

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  • DOI: https://doi.org/10.1007/s10163-019-00949-8

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